Flora of North America species comparison

erect, scabro-hispid to hirsute (sometimes glaucous).

erect, usually ± hairy.

mostly cauline; opposite or alternate proximally, usually alternate distally;

petioles 2–8 cm (often ± winged);

blades (3-nerved from near bases) lanceolate to ovate, 10–23 × 7–15 cm, bases broadly to narrowly cuneate, margins entire or serrate (flat), abaxial faces puberulent or hirsutulous to tomentulose and gland-dotted (abaxial) or ± scabrous (adaxial).

mostly cauline; opposite or alternate;

sessile or subsessile;

blades (3-nerved near bases) narrowly lanceolate to linear, 8–15 × 0.15–0.5(–1) cm, bases cuneate, margins entire (revolute, abaxial face sometimes obscured by rolled margins), abaxial faces strigose to hispid or hirsute, sometimes (adaxial not) gland-dotted.

1–15 cm.

5–15 cm.

hemispheric, (10–25 ×) 8–12 mm.

shallowly hemispheric, 10–20 mm diam.

10–20;

laminae 25–40 mm.

10–20;

laminae 10–20 mm (abaxial faces gland-dotted).

60+;

corollas 6–7 mm, lobes yellow;

anthers dark brown or black, appendages dark or yellowish.

75+;

corollas 4–4.5 mm, lobes yellow;

anthers dark brown or black, appendages dark (style branches usually yellow).

(often dark green, drying nearly black) 22–35 (bases appressed, apices ± spreading, sometimes reflexed in fruit), lanceolate, 8.5–15 × 2–4 mm (subequal), (margins ciliate) apices acuminate, abaxial faces hispidulous or puberulent, gland-dotted.

25–32 (loose), lanceolate, 4–9 × 1–2 mm, apices acute to slightly acuminate, abaxial faces usually scabrous, rarely glabrous, usually gland-dotted.

3–15.

3–16.

5–7 mm, glabrous or distally hairy;

pappi of 2 aristate scales 1.9–3 mm plus 0–1 deltate scales 0.5–0.8 mm.

2–3 mm, glabrate;

pappi of 2 aristate scales 1.5–2.1 mm.

8–9 mm, 3-toothed (apices hairy).

(oblanceolate) 5.5–6.5 mm, entire or ± 3-toothed (apices purplish, mucronate, gland-dotted).

= 102.

= 34.